Need help with Lilliput Touchscreen driver problem

After many attempts I cannnot seem to get the touchscreen to work on my in-dash lilliput. I have installed both old and new drivers and nothing works. The computer shows the touchscreen as a USB touchscreen controller but the touchkit does not pick it up on any com ports it seems. I took apart the screen to check for loose or damaged connections and all looks well. Any ideas? Thanks in advance

same problem with my TM-868.....sees the USB connector when I plug it in, makes "ding" noise....registers it as a "unknown device" and thats about all that happens. Funny thing is, when I bough it, it worked just fine and it slowly stopped functioning...Im at a loss, so im about to throw this thing in the trash